Year	Percent
1950	10.14082
1955	10.22708
1960	10.09419
1965	9.72703
1970	9.33025
1975	9.45171
1980	11.06762
1985	11.36651
1990	10.76135
1995	11.14984
2000	11.1445
2005	10.77953
2010	10.23581
2015	9.85643
2020	9.3541
2025	8.48155
2030	7.86293
2035	7.40777
2040	6.92458
2045	6.44933
2050	6.00715
2055	5.64725
2060	5.392
2065	5.19228
2070	5.02848
2075	4.89882
2080	4.7978
2085	4.73111
2090	4.68448
2095	4.65794
2100	4.64553